Voracious appetite; will eat almost anything that moves and that it can swallow - including invertebrates and small vertebrates such as mammals, birds, reptiles, fish, and even turtles and other frogs

INCUBATION:

Hatch in four days or less

CLUTCH SIZE

20,000 eggs produced by a single large female

LARVAL DURATION

SEXUAL MATURITY:

2-4 years

LIFE SPAN:

Average 4-5 years

RANGE:

Nova Scotia to Central Florida, west to Wisconsin and the Rockies; introduced to British Columbia and California

HABITAT:

Vegetation along edge of large, slow moving bodies of freshwater

POPULATION:

GLOBAL

No data

STATUS:

IUCN

Not listed

CITES

Not listed

USFWS

Not listed

FUN FACTS

1.

North American bullfrogs are capable of leaping 1 to 2 m (3-6 ft).

2.

North American bullfrogs are territorial and protect their territories by calls, displays, chases, jump attacks, and even wrestling. Females are attracted to males with territories that provide the most food.

3.

A female North American bullfrog can lay up to 25,000 small eggs that are held together at the surface of the water.

4.

Hearing is one of the most important senses to a frog. Male North American bullfrogs chorus at breeding ponds; females also give aggressive and reciprocation calls.

5.

North American bullfrogs have teeth in the roof of their mouth and a muscular tongue capable of flipping prey into their mouth.

6.

North American bullfrogs may remain at the tadpole stage for up to 2 years. A longer tadpole stage means a larger frog after metamorphosis, which usually means a better chance of survival.

7.

North American bullfrogs close their nostrils and continue to absorb oxygen through their skin while under water.

8.

In general, frogs have smooth skin while toads have textured skin.

ECOLOGY AND CONSERVATION

Where North American bullfrogs occur naturally, they are common and help keep populations of insects in check. But they have been introduced into areas of the western United States where, because of their appetite, they are capable of reducing or destroying local populations of native species. Their populations can increase to become out of balance with the species native to those habitats because often they have no natural predators and their skin secretions make them unpalatable to many animals. Bullfrogs, like all amphibians, have porous skin and respond quickly to changes in the environment. The health of their populations can be an indicator of the health of the environment.